TiZr base amorphous alloy with low Cu and Ni contents and preparation method thereof

Abstract

The invention discloses a TiZr base amorphous alloy with low Cu and Ni contents and a preparation method thereof, and belongs to the technical field of welding. The TiZr base amorphous alloy is suitable for brazed connection of one kind of material or dissimilar materials such as titanium alloy, TiAl intermetallic compound, steel and ceramic. The components of brazing filler metal comprises, by mass percent, Cu accounts for 3-15%, Ni accounts for 1-10%, Si accounts for 0.1-2%, X accounts for 0.5-8%, Y accounts for 0.1-8%, and Ti and Zr account for the rest, wherein the X represents Co or Fe or Co and Fe, Y represents Al or Sn or Al and Sn. Thin band-shaped amorphous alloy brazing filler metal as thick as 20-50 microns is obtained through the rapid solidification technology. Compared with the prior titanium base brazing filler metal and TiZr base amorphous alloy brazing filler metal, the brazing filler metal made of the TiZr base amorphous alloy with low Cu and Ni contents has the advantages that the fusing point is low, the contents of Cu and Ni are low (lower than 20%), and soldered joints are good in property, high in reliability and wide in application range.

Description

technical field [0001] The invention belongs to the field of welding technology, and specifically discloses a TiZr-based amorphous alloy solder with low Cu and Ni content and a preparation method thereof. Background technique [0002] As a metal thermal connection method, brazing has become one of the important welding technologies for precision connection of parts in the high-tech field. Among the many factors that determine the quality of brazing, solder plays an important role. Titanium-based alloy brazing filler metal has the advantages of high activity, heat resistance, good corrosion resistance, excellent oxidation resistance, and good brazing process performance, and is a kind of brazing filler metal with great application prospects. In the early stage of titanium-based alloy solder research, people tried to add Cu, Ni, Zr, Be, Co, V and other elements to the alloy to reduce the melting point of the solder. The main alloying elements of the existing titanium-based al...

AI Technical Summary

Problems solved by technology

However, the content of Cu and Ni in the existing titanium-based alloy brazing material is relatively high, and brittle compound phases are formed after brazing, such as Ti 2 Cu, Ti 2 Ni, δ-TiCu and Ti 3 Cu 4 etc. Brazed joints are prone to varying degrees of brittleness, which reduces the performance of brazed joints

Moreover, the titanium-based alloy brazing filler metal itself has poor processability, and the preparation of foil is difficult, which limits the use form of the brazing filler metal.

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